The question is easily answered using the calculator in your computer. But, since you are obviously not capable of doing so, the answer is 156.
234
If you are driving 2340 miles, based on a car that gets 15 miles to the gallon, take 2340 divided by 15. That is 117 gallons that you are going to need. 117 times $3 a gallon (depending on the price of gas) equals $350.00.
26
731.25
26
26
0.0226
2340 degrees
A polygon of 15 sides has interior angles that add up to 2340 degrees.
2340
(15-2)*180 =2340
It is 2340/15 = 156 degrees